5781971 has 4 divisors (see below), whose sum is σ = 6226752. Its totient is φ = 5337192.

The previous prime is 5781961. The next prime is 5781977. The reversal of 5781971 is 1791875.

5781971 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5781971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5781977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 222371 + ... + 222396.

It is an arithmetic number, because the mean of its divisors is an integer number (1556688).

Almost surely, 2^5781971 is an apocalyptic number.

5781971 is a deficient number, since it is larger than the sum of its proper divisors (444781).

5781971 is a wasteful number, since it uses less digits than its factorization.

5781971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444780.

The product of its digits is 17640, while the sum is 38.

The square root of 5781971 is about 2404.5729350552. The cubic root of 5781971 is about 179.4838195340.

It can be divided in two parts, 57 and 81971, that added together give a palindrome (82028).

The spelling of 5781971 in words is "five million, seven hundred eighty-one thousand, nine hundred seventy-one".